Growth and piezoelectric properties of ferroelectric mono-domain crystals

✍ Scribed by Hiroaki Takeda; Joong Sang Han; Masaya Nishida; Tadashi Shiosaki; Takuya Hoshina; Takaaki Tsurumi

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 481 KB
• Volume: 150
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/j.ssc.2010.02.011

✦ Synopsis

A mono-domain crystal of Bismuth tungstate Bi 2 WO 6 , one of the bismuth layered structure ferroelectric (BLSF) compounds, is synthesized by a slow cooling method using lithium tetra-borate as the flux below the Curie temperature of 940 °C. Fifteen of seventeen independent tensor components of dielectric constant ε ij /ε 0 , piezoelectric constant d ij and elastic compliance s ij are determined. The dielectric constants, ε ij /ε 0 , were about 100, 70 and 70 for ij = 11, 22 and 33 and the piezoelectric constants, d 31 and d 33 were -17 and 27 pC/N, respectively. These characteristics are consistent with those of BLSF grainoriented ceramics. The resonance response revealed that the BWO crystals maintained the piezoelectricity up to 400 °C.